Hello Guys, here are the answers to the most frequently asked questions in an interview about Network firewalls. you will get here the answers of all the Firewall related Question asked in the interview.
In this PPT you can learn a firewall and types which help you a lot and you can able to understand. So, that you must read at once I sure that you are understand
Thank you!!!
I
A Zero Trust approach should extend throughout the entire digital estate and serve as an integrated security philosophy and end to end strategy.
Identities. Identities whether they represent people, services, or IOT devices define the Zero Trust control plane. When an identity attempts to access a resource, we need to verify that identity with strong authentication, ensure access is compliant and typical for that identity, and follows least privilege access principles.
Devices. Once an identity has been granted access to a resource, data can flow to a variety of different devices From IoT devices to smartphones, BYOD to partner managed devices, and on premises workloads to cloud hosted servers. This diversity creates a massive attack surface area, requiring we monitor and enforce device health and compliance for secure access.
Applications. Applications and APIs provide the interface by which data is consumed. They may be legacy on premises, lift and shifted to cloud workloads, or modern SaaS applications. Controls and technologies should be applied to discover Shadow IT, ensure appropriate in-app permissions, gate access based on real-time analytics, monitor for abnormal behavior, control of user actions, and validate secure configuration options.
Data. Ultimately, security teams are focused on protecting data. Where possible, data should remain safe even if it leaves the devices, apps, infrastructure, and networks the organization controls. Data should be classified, labeled, and encrypted, and access restricted based on those attributes.
Infrastructure. Infrastructure (whether on premises servers, cloud based VMs, containers, or micro services) represents a critical threat vector. Assess for version, configuration, and JIT access to harden defense, use telemetry to detect attacks and anomalies, and automatically block and flag risky behavior and take protective actions.
Networks. All data is ultimately accessed over network infrastructure. Networking controls can provide critical “in pipe” controls to enhance visibility and help prevent attackers from moving laterally across the network. Networks should be segmented (including deeper in network micro segmentation) and real time threat protection, end to end encryption, monitoring, and analytics should be employed.
Each of these six foundational elements serves as a source of the signal, a control plane for enforcement, and a critical resource to defend. You should appropriately spread your investments across each of these elements for maximum protection.
In this PPT you can learn a firewall and types which help you a lot and you can able to understand. So, that you must read at once I sure that you are understand
Thank you!!!
I
A Zero Trust approach should extend throughout the entire digital estate and serve as an integrated security philosophy and end to end strategy.
Identities. Identities whether they represent people, services, or IOT devices define the Zero Trust control plane. When an identity attempts to access a resource, we need to verify that identity with strong authentication, ensure access is compliant and typical for that identity, and follows least privilege access principles.
Devices. Once an identity has been granted access to a resource, data can flow to a variety of different devices From IoT devices to smartphones, BYOD to partner managed devices, and on premises workloads to cloud hosted servers. This diversity creates a massive attack surface area, requiring we monitor and enforce device health and compliance for secure access.
Applications. Applications and APIs provide the interface by which data is consumed. They may be legacy on premises, lift and shifted to cloud workloads, or modern SaaS applications. Controls and technologies should be applied to discover Shadow IT, ensure appropriate in-app permissions, gate access based on real-time analytics, monitor for abnormal behavior, control of user actions, and validate secure configuration options.
Data. Ultimately, security teams are focused on protecting data. Where possible, data should remain safe even if it leaves the devices, apps, infrastructure, and networks the organization controls. Data should be classified, labeled, and encrypted, and access restricted based on those attributes.
Infrastructure. Infrastructure (whether on premises servers, cloud based VMs, containers, or micro services) represents a critical threat vector. Assess for version, configuration, and JIT access to harden defense, use telemetry to detect attacks and anomalies, and automatically block and flag risky behavior and take protective actions.
Networks. All data is ultimately accessed over network infrastructure. Networking controls can provide critical “in pipe” controls to enhance visibility and help prevent attackers from moving laterally across the network. Networks should be segmented (including deeper in network micro segmentation) and real time threat protection, end to end encryption, monitoring, and analytics should be employed.
Each of these six foundational elements serves as a source of the signal, a control plane for enforcement, and a critical resource to defend. You should appropriately spread your investments across each of these elements for maximum protection.
Security Event Analysis Through CorrelationAnton Chuvakin
This paper covers several of the security event correlation methods, utilized by Security Information Management (SIM) solutions for better attack and misuse detection. We describe these correlation methods, show their corresponding advantages and disadvantages and explain how they work together for maximum security.
Transport Layer Security (TLS) is a protocol that ensures privacy between communicating applications and their users on the Internet. When a server and client communicate, TLS ensures that no third party may eavesdrop or tamper with any message. TLS is the successor to the Secure Sockets Layer (SSL).
Being aware of the trends that are expected to shape the digital landscape is an important step in ensuring the security of your data and online assets.
Amongst others, the webinar covers:
• Top Cyber Trends for 2023
• Cyber Insurance
• Prioritization of Cyber Risk
Presenters:
Colleen Lennox
Colleen Lennox is the Founder of Cyber Job Central, a newly formed job board dedicated to Cybersecurity job openings. Colleen has 25+ years in Technical Recruiting and loves to help other find their next great job!
Madhu Maganti
Madhu is a goal-oriented cybersecurity/IT advisory leader with more than 20 years of comprehensive experience leading high-performance teams with a proven track record of continuous improvement toward objectives. He is highly knowledgeable in both technical and business principles and processes.
Madhu specializes in cybersecurity risk assessments, enterprise risk management, regulatory compliance, Sarbanes-Oxley (SOX) compliance and system and organization controls (SOC) reporting.
Date: January 25, 2023
Tags: ISO, ISO/IEC 27032, Cybersecurity Management
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Find out more about ISO training and certification services
Training: https://pecb.com/en/education-and-certification-for-individuals/iso-iec-27032
https://pecb.com/article/cybersecurity-risk-assessment
https://pecb.com/article/a-deeper-understanding-of-cybersecurity
Webinars: https://pecb.com/webinars
Article: https://pecb.com/article
Whitepaper: https://pecb.com/whitepaper
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For more information about PECB:
Website: https://pecb.com/
LinkedIn: https://www.linkedin.com/company/pecb/
Facebook: https://www.facebook.com/PECBInternational/
Slideshare: http://www.slideshare.net/PECBCERTIFICATION
YouTube video: https://youtu.be/BAAl_PI9uRc
Module 19 (evading ids, firewalls and honeypots)Wail Hassan
An Intrusion Detection System (IDS) is a device or software application that monitors network and/or system activities for malicious activities or policy violations and produces reports to a Management Station. Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system.
Cyberoam offers next-generation firewall and UTM firewall that provide stateful and deep packet inspection for network, application and user identity-based security. Cyberoam firewall appliances provide ease of management and high security with flexibility.
A firewall is a network security device.abidhassan225
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.
Security Event Analysis Through CorrelationAnton Chuvakin
This paper covers several of the security event correlation methods, utilized by Security Information Management (SIM) solutions for better attack and misuse detection. We describe these correlation methods, show their corresponding advantages and disadvantages and explain how they work together for maximum security.
Transport Layer Security (TLS) is a protocol that ensures privacy between communicating applications and their users on the Internet. When a server and client communicate, TLS ensures that no third party may eavesdrop or tamper with any message. TLS is the successor to the Secure Sockets Layer (SSL).
Being aware of the trends that are expected to shape the digital landscape is an important step in ensuring the security of your data and online assets.
Amongst others, the webinar covers:
• Top Cyber Trends for 2023
• Cyber Insurance
• Prioritization of Cyber Risk
Presenters:
Colleen Lennox
Colleen Lennox is the Founder of Cyber Job Central, a newly formed job board dedicated to Cybersecurity job openings. Colleen has 25+ years in Technical Recruiting and loves to help other find their next great job!
Madhu Maganti
Madhu is a goal-oriented cybersecurity/IT advisory leader with more than 20 years of comprehensive experience leading high-performance teams with a proven track record of continuous improvement toward objectives. He is highly knowledgeable in both technical and business principles and processes.
Madhu specializes in cybersecurity risk assessments, enterprise risk management, regulatory compliance, Sarbanes-Oxley (SOX) compliance and system and organization controls (SOC) reporting.
Date: January 25, 2023
Tags: ISO, ISO/IEC 27032, Cybersecurity Management
-------------------------------------------------------------------------------
Find out more about ISO training and certification services
Training: https://pecb.com/en/education-and-certification-for-individuals/iso-iec-27032
https://pecb.com/article/cybersecurity-risk-assessment
https://pecb.com/article/a-deeper-understanding-of-cybersecurity
Webinars: https://pecb.com/webinars
Article: https://pecb.com/article
Whitepaper: https://pecb.com/whitepaper
-------------------------------------------------------------------------------
For more information about PECB:
Website: https://pecb.com/
LinkedIn: https://www.linkedin.com/company/pecb/
Facebook: https://www.facebook.com/PECBInternational/
Slideshare: http://www.slideshare.net/PECBCERTIFICATION
YouTube video: https://youtu.be/BAAl_PI9uRc
Module 19 (evading ids, firewalls and honeypots)Wail Hassan
An Intrusion Detection System (IDS) is a device or software application that monitors network and/or system activities for malicious activities or policy violations and produces reports to a Management Station. Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system.
Cyberoam offers next-generation firewall and UTM firewall that provide stateful and deep packet inspection for network, application and user identity-based security. Cyberoam firewall appliances provide ease of management and high security with flexibility.
A firewall is a network security device.abidhassan225
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.
Firewalls have been the first line of defense in network security for over 25 years. They establish a barrier between secured and controlled internal networks that can be trusted and untrusted outside networks, such as the Internet.
A firewall can be hardware, software, or both.
In computing, a firewall is a software or hardware-based network security system that controls the incoming and outgoing network traffic by analyzing the data packets and determining whether they should be allowed through or not, based on a rule set. A firewall establishes a barrier between a trusted, secure internal network and another network (e.g., the Internet) that is not assumed to be secure and trusted.
It is for the new users those don't have much knowledge regarding IT Security. Here i focus on Windows In built firewall, Comodo, Zone Alarm and Out Post pro configuration basics.
Threat Hunting Procedures and Measurement MatriceVishal Kumar
This document will provide the basics of Cyber Threat Hunting and answers of some Q such as; What is Threat Hunting?, What is the Importance of Threat Hunting, and How it can be start....Bla..Bla..Bla...
E-mail Security Protocol - 2 Pretty Good Privacy (PGP)Vishal Kumar
Pretty Good privacy. we will discuss in this document about the E-mail security protocol number 2 which is PGP, you will learn about the working of PGP, PGP Algorithms, PGP Key Rings, PGP Certificates and about the Web Trust in PGP.
This document will make you understand the basic issues related to E-mail like, Spamming, Bombing, Malware, Email Spoofing and Email Bankruptcy, etc. after that you will learn about the first Email security protocol Privacy Enhanced Mail (PEM), step-by-step working of PEM.
Privileges Escalation by Exploiting Client-Side Vulnerabilities Using MetasploitVishal Kumar
This Document will show you how get the privileges through exploiting the vulnerabilities using the Metasploit in Kali Linux. this will help a pen-tester to examine the security level of a system.
Auditing System Password Using L0phtcrackVishal Kumar
The objective of this presentation is to help peoples to learn how to use L0htCrack tool to attain and crack the user password from any Windows Machine.
Dumping and Cracking SAM Hashes to Extract Plaintext PasswordsVishal Kumar
This Lab will show you how to dump the Windows protected password storage SAM file using the tool pwdump7 and then crack the hash with an hash cracker tool that is Ophcrack and extract the plain-text password.
Fundamental of Secure Socket Layer (SSL) | Part - 2 Vishal Kumar
In this presentation we will learn about the Record Protocol, Alert Protocol, Closing and Resuming SSL Connections and Attacks on SSL.
The Part - 1 cab be founded at : https://www.slideshare.net/vishalkumar245/fundamental-of-secure-socket-layer-ssl-part-1
The Fundamental of Electronic Mail (E-mail)Vishal Kumar
This document contain the complete information about the Electronic mail. you will learn the basic structure and flow of email message, the Header and response codes, etc.
Fundamental of Secure Socket Layer (SSl) | Part - 1Vishal Kumar
"The Fundamental of SSL" it is the first part of this Topic in which we covered covers the deep understanding of Secure Socket Layer, its position in the TCP/IP suit, its sub protocols and the working or Handshake Protocol.
The Fundamental of Secure Socket Layer (SSL)Vishal Kumar
"The Fundamental of SSL" it is the first part of this Topic in which we covered covers the deep understanding of Secure Socket Layer, its position in the TCP/IP suit, its sub protocols and the working or Handshake Protocol.
The presentation is contains the Overview of the Hawkeye Malware. you will find the execution working flow and how this malware spread across the network inside this presentation
Exploiting parameter tempering attack in web applicationVishal Kumar
Web Parameter Tampering attack involve the manipulation of parameter exchanged between a client and a server to modify application data such as user credentials and permissions, prices, and product quantities.
Web Site Mirroring creates a replica of an existing site. It allows you to download a website to a local directory, analyze all directories HTML, Images, Flash, Videos, and other files from the server on your computer.
Collecting email from the target domain using the harvesterVishal Kumar
The objective of this program is to gather emails, subdomains, hosts, employee names, open ports and banners from different public sources like search engines, PGP key servers and SHODAN computer database.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
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Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
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What is a Firewall?
Firewall is a device that is placed between a trusted and an untrusted network. It
deny or permit traffic that enters or leaves network based on pre-configured
policies. Firewalls protect inside networks from unauthorized access by users on an
outside network. A firewall can also protect inside networks from each other for
example by keeping a Management network separate from a user network.
What is the difference between Gateway and Firewall?
A Gateway joins two networks together and a network firewall protects a network
against unauthorized incoming or outgoing access. Network firewalls may be
hardware devices or software programs.
Firewalls work at which Layers?
Firewalls work at layer 3, 4 & 7.
What is the difference between Stateful & Stateless Firewall?
Stateful firewall – A Stateful firewall is aware of the connections that pass
through it. It adds and maintains information about a user’s connections in a state
table, referred to as a connection table. It than uses this connection table to
implement the security policies for users connections. Example of stateful firewall
are PIX, ASA, Checkpoint.
Stateless firewalls – (Packet Filtering) Stateless firewalls on the other hand, does
not look at the state of connections but just at the packets themselves.
What information does Stateful Firewall Maintains?
Stateful firewall maintains following information in its State table:-
1.Source IP address.
2. Destination IP address.
3. IP protocol like TCP, UDP.
4. IP protocol information such as TCP/UDP Port Numbers, TCP Sequence Numbers,
and TCP Flags.
How can we allow packets from lower security level to higher security level
(Override Security Levels)?
We use ACLs to allow packets from lower security level to higher security level.
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What is the security level of Inside and Outside Interface by default?
Security Level of Inside interface by default is 100. Security Level of Outside
Interface by default is 0.
Explain DMZ (Demilitarized Zone)?
If we need some network resources such as a Web server or FTP server to be
available to outside users we place these resources on a separate network behind
the firewall called a demilitarized zone (DMZ). The firewall allows limited access to
the DMZ, but because the DMZ only includes the public servers, an attack there
only affects the servers and does not affect the inside network.
How does a firewall process a packet?
When a packet is received on the ingress interface, Firewall checks if it matches
an existing entry in the connection table. If it does, protocol inspection is carried
out on that packet.
If it does not match an existing connection and the packet is either a TCP-SYN
packet or UDP packet, the packet is subjected to ACL checks. The reason it needs
to be a TCP-SYN packet is because a SYN packet is the first packet in the TCP 3-
way handshake. Any other TCP packet that isn’t part of an existing connection is
likely an attack.
If the packet is allowed by ACLs and is also verified by translation rules, the
packet goes through protocol inspection.
What are the values for timeout of TCP session, UDP session, ICMP session?
TCP session – 60 minutes
UDP session – 2 minutes
ICMP session – 2 seconds
Explain TCP Flags?
While troubleshooting TCP connections through the Firewall, the connection flags
shown for each TCP connection provide information about the state of TCP
connections to the Firewall.
What are the different types of ACL in Firewall?
1.Standard ACL
2.Extended ACL
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3.Ethertype ACL (Transparent Firewall)
4.Webtype ACL (SSL VPN)
What is Transparent Firewall?
In Transparent Mode, Firewall acts as a Layer 2 device like a bridge or switch and
forwards Ethernet frames based on destination mac-address.
What is the need of Transparent Firewall?
If we want to deploy a new firewall into an existing network it can be a complicated
process due to various issues like IP address reconfiguration, network topology
changes, current firewall etc. We can easily insert a transparent firewall in an
existing segment and control traffic between two sides without having to
readdress or reconfigure the devices.
Explain Ether-Type ACL?
In Transparent mode, unlike TCP/IP traffic for which security levels are used to
permit or deny traffic all non-IP traffic is denied by default. We create Ether-
Type ACL to allow NON-IP traffic. We can control traffic like BPDU, IPX etc. with
Ether-Type ACL.
What is Policy NAT?
Policy NAT allows you to NAT by specifying both the source and destination
addresses in an extended access list. We can also optionally specify the source and
destination ports. Regular NAT can only consider the source addresses, not the
destination address.
In Static NAT it is called as Static Policy NAT.
In Dynamic NAT it is called as Dynamic Policy NAT.
Give the order of preference between different types of NAT?
1. Nat exemption.
2. Existing translation in Xlate.
3.Static NAT
– Static Identity NAT
– Static Policy NAT
– Static NAT
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– Static PAT
4. Dynamic NAT
– NAT Zero
– Dynamic Policy NAT
– Dynamic NAT
– Dynamic PAT
What is the difference between Auto NAT & Manual NAT?
Auto NAT (Network Object NAT) – It only considers the source address while
performing NAT. So, Auto NAT is only used for Static or Dynamic NAT. Auto NAT
is configured within an object.
Manual NAT (Twice NAT) – Manual NAT considers either only the source address
or the source and destination address while performing NAT. It can be used for
almost all types of NAT like NAT exempt, policy NAT etc.
Unlike Auto NAT that is configured within an object, Manual NAT is configured
directly from the global configuration mode.
Give NAT Order in terms of Auto NAT & Manual NAT?
NAT is ordered in 3 sections.
Section 1 – Manual NAT
Section 2 – Auto NAT
Section 3 – Manual Nat After-Auto
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